The Question Behind the Question
When people ask "should I buy new or used?" they're usually asking the wrong question. The real question is: what's the lowest total cost to own reliable transportation for the next 5–8 years? That includes purchase price, financing cost, depreciation, insurance, maintenance, and reliability.
In 2026, the math has shifted somewhat from historical patterns. Used car prices remain elevated compared to pre-2020 levels, and new car incentives (including 0% APR deals) are available on more models than before. Here's a complete breakdown.
The Depreciation Math
New cars depreciate approximately 15–20% in their first year. On a $35,000 vehicle, that's $5,250–$7,000 in lost value in 12 months. By year three, the vehicle may be worth only 60–65% of its original value — a $12,000–$14,000 loss if sold.
This is the core argument for buying used: you let someone else absorb that first-year depreciation hit, then buy the car at its post-depreciation price.
| Vehicle Price | Year 1 Depreciation (18%) | Year 3 Value (64%) | 5-Year Total Depreciation |
|---|---|---|---|
| $25,000 | $4,500 | $16,000 | ~$13,750 |
| $35,000 | $6,300 | $22,400 | ~$19,250 |
| $45,000 | $8,100 | $28,800 | ~$24,750 |
| $55,000 | $9,900 | $35,200 | ~$30,250 |
Loan Rate Differences in 2026
Lenders charge higher rates for used vehicles because used cars are harder to repossess and sell (less liquidity), depreciate more unpredictably, and carry more mechanical uncertainty. As of April 2026:
- Average new car APR: 6.37% (Experian Q4 2025)
- Average used car APR: 11.26% (Experian Q4 2025)
For borrowers with excellent credit (720+), the gap narrows: PenFed offers 3.39% on new cars and 4.34% on used. For average-credit borrowers (680–720), the gap is larger — typically 2–3% APR.
The 0% APR New Car Trap
Manufacturer-subsidised 0% APR loans for new cars are often the best financing available — but they come with conditions. Always check:
- Is the 0% competing with a cash rebate? (Sometimes the cash rebate + market-rate loan beats the 0% loan when calculated carefully)
- What's the loan term? (72-month 0% APR for a car that depreciates $12,000 in year one still isn't "free")
- Does 0% require excellent credit? (Most 0% offers require 720+ FICO)
- Is this on a model you actually want, or on slow-moving inventory?
Compare New and Used Car Loan Rates
See rates side by side for both new and used before you decide which to buy.
Full Cost Comparison: $30,000 New vs $20,000 Used
This is the most realistic comparison — not new vs used at the same price point, but new vs used at typical market price difference for similar vehicles. Assume the new car is a 2026 model, and the used is a 2023 model with 28,000 miles.
| Cost Factor | New — $30,000 @ 5.5% / 60mo | Used — $20,000 @ 7.5% / 60mo |
|---|---|---|
| Monthly payment | $573 | $400 |
| Total interest paid | $4,380 | $4,000 |
| 5-year depreciation | ~$16,500 (55%) | ~$8,000 (40% of $20K) |
| Insurance premium (higher on new) | +$600/yr vs used | Baseline |
| Maintenance (new in warranty) | Low | Slightly higher after yr 4 |
| Total 5-year cost estimate | ~$48,000 | ~$36,000 |
The CPO Sweet Spot
Certified Pre-Owned (CPO) vehicles deserve their own category. A CPO vehicle from a franchise dealer has:
- Passed a multi-point manufacturer inspection (100–150 point checks)
- Extended manufacturer warranty coverage (typically 2–5 additional years/50–100K miles)
- Often eligible for manufacturer financing rates (sometimes close to new car rates)
- Typically 2–4 years old with low to moderate mileage
CPO pricing sits between new and used — typically 10–25% below equivalent new — but you get warranty protection and inspection certification that private-party used cars don't provide. For buyers who want reliability without full new-car depreciation, CPO is often the best answer.
When New Is the Right Choice
- You qualify for a 0% APR manufacturer deal that genuinely beats market rates
- You plan to keep the car 8–10+ years (longer ownership dilutes the depreciation hit per year)
- The specific new model has significant safety or technology improvements over the previous generation
- You're buying an EV with federal and state credits that materially reduce the effective price
- Reliability is paramount and you value the full factory warranty from day one
When Used Is the Right Choice
- Budget is a primary constraint and you need the lowest monthly payment
- You can find a CPO or low-mileage used model with remaining warranty
- You're a high-mileage driver (depreciation hits hard when you put on 20K+ miles/year)
- Your credit score is below 700 and the rate gap between new and used is smaller for your profile
- The vehicle you want is a proven, stable model without a recent redesign
The Bottom Line
For most buyers with good credit and a reasonable budget: a 2–4 year old CPO vehicle from a reputable franchise dealer is the optimal choice. You avoid first-year depreciation, get warranty coverage, and pay a significantly lower purchase price than new.
For buyers with excellent credit who qualify for 0% APR manufacturer financing on a vehicle they'd keep 8+ years: new can be the right choice.
For buyers with tight budgets or lower credit: a reliable used car minimises the loan amount, which is more important than the rate differential at low loan amounts.